Abstract: In an RF power calculation apparatus and method for an MRI system, a first power calculation processor calculates a first power of an RF signal received by a first receiving method, a second power calculation processor calculates a second power of the RF signal received by a second receiving method, a difference calculation processor calculates the difference between the first power and second power, an RF power calculation processor calculates an RF power of the RF signal on the basis of the first power and second power when the difference is smaller than a first threshold.

Abstract: The present utility model provides a gradient coil detection device and an MRI system. The gradient coil checking device for an MRI system comprises: a voltage sampling circuit, comprising: a sample voltage input end, connected between a gradient power amplifier of the MRI system and the gradient coil and obtaining a gradient coil sample voltage, and a sample voltage output end; a current sampling circuit, a sample current input end, connected to the gradient power amplifier of the MRI system and obtaining a gradient coil sample current, and a sample current output end; a calculation unit, connected to the sample voltage output end and the sample current output end, and used for calculating a gradient coil calculated resistance according to the gradient coil sample voltage and the gradient coil sample current; a comparison unit, connected to the calculation unit, and used for comparing the gradient coil calculated resistance with a reference value to obtain a result signal.

Abstract: In an RF power calculation apparatus and method for an MRI system, a first power calculation processor calculates a first power of an RF signal received by a first receiving method, a second power calculation processor calculates a second power of the RF signal received by a second receiving method, a difference calculation processor calculates the difference between the first power and second power, an RF power calculation processor calculates an RF power of the RF signal on the basis of the first power and second power when the difference is smaller than a first threshold.

Abstract: The present utility model provides a gradient coil detection device and an MRI system. The gradient coil checking device for an MRI system comprises: a voltage sampling circuit, comprising: a sample voltage input end, connected between a gradient power amplifier of the MRI system and the gradient coil and obtaining a gradient coil sample voltage, and a sample voltage output end; a current sampling circuit, a sample current input end, connected to the gradient power amplifier of the MRI system and obtaining a gradient coil sample current, and a sample current output end; a calculation unit, connected to the sample voltage output end and the sample current output end, and used for calculating a gradient coil calculated resistance according to the gradient coil sample voltage and the gradient coil sample current; a comparison unit, connected to the calculation unit, and used for comparing the gradient coil calculated resistance with a reference value to obtain a result signal.

Abstract: A drive device of a hospital bed, a hospital bed, and a magnetic resonance imaging system are disclosed. The drive device includes: a first power interruption component, connected to a first transmission mechanism, and used for controlling power supply of the first transmission mechanism, where the first transmission mechanism is used for driving a bed body of the hospital bed to move in a first direction. A second power interruption component is connected to a second transmission mechanism, and used for controlling power supply of the second transmission mechanism, where the second transmission mechanism is used for driving the bed body to move in a second direction. The device also includes a motor, where the motor is connected to the first power interruption component and the second power interruption component; and a controller, used for controlling the motor, the first power interruption component, and the second power interruption component.